The Epson MFP Composite Device driver is used for Epson multi-function printers (MFPs) or all-in-one devices, which combine printing, scanning, copying, and sometimes faxing capabilities into a single machine. The "Composite Device" term typically refers to the fact that the printer communicates with your computer as a multi-functional device (combining printing, scanning, and other features into one driver package).

The Windows driver for the Epson MFP Composite Device allows your computer to interface with these multi-functional printers. Without the correct driver, your computer might not recognize the printer or be able to use all of its features, such as scanning or copying.